JPS56126347A - Decoding method of convolutional code - Google Patents

Decoding method of convolutional code

Info

Publication number
JPS56126347A
JPS56126347A JP3061980A JP3061980A JPS56126347A JP S56126347 A JPS56126347 A JP S56126347A JP 3061980 A JP3061980 A JP 3061980A JP 3061980 A JP3061980 A JP 3061980A JP S56126347 A JPS56126347 A JP S56126347A
Authority
JP
Japan
Prior art keywords
compensation
threshold value
value
correction
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP3061980A
Other languages
Japanese (ja)
Inventor
Tsuneo Hirose
Shinichi Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP3061980A priority Critical patent/JPS56126347A/en
Publication of JPS56126347A publication Critical patent/JPS56126347A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0059—Convolutional codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Error Detection And Correction (AREA)

Abstract

PURPOSE:To enhance an error detecting capacity with a reduction of occurrence probability of fillip sound and thus prevent the occurrence of an unpleasant sound through a speaker of the audio machinery or the like, by selecting the compensation inspecting value at a proper level in case to decode the threshold value of a convolutional code having a specified orthogonal number. CONSTITUTION:A composite circuit consists of the shift registers J1-J6 and S0- S5, the threshold value circuit 12, the detector 13 that detects that 2 or 3 units are 1 during a parity inselection [AV], and the corrector/compensator 14 having the function to perform a correcting action when the output of the circuit 12 is 1 plus the function to perform a compensation with the one-preceding information when the output of the detector 13 is 1 respectively. In general the threshold value of correction is set at t+a (a>=2) when the orthogonal number J is set as J=2t (t: an integer). Then the detection value of compensation is selected at t+a--t-a+2. In such way, the compensating capacity can be enhanced. When J=2t+1 is set, this means the t double and t+1 double error correction and detection codes respectively. For these codes, the compensating capacity is enhanced if the threshold value of correction is selected at t+a (a>=3) along with the inspection value of compensation set at t+a-1-t-a+3 respectively.
JP3061980A 1980-03-10 1980-03-10 Decoding method of convolutional code Pending JPS56126347A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3061980A JPS56126347A (en) 1980-03-10 1980-03-10 Decoding method of convolutional code

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3061980A JPS56126347A (en) 1980-03-10 1980-03-10 Decoding method of convolutional code

Publications (1)

Publication Number Publication Date
JPS56126347A true JPS56126347A (en) 1981-10-03

Family

ID=12308872

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3061980A Pending JPS56126347A (en) 1980-03-10 1980-03-10 Decoding method of convolutional code

Country Status (1)

Country Link
JP (1) JPS56126347A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8286061B2 (en) 2009-05-27 2012-10-09 International Business Machines Corporation Error detection using parity compensation in binary coded decimal and densely packed decimal conversions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8286061B2 (en) 2009-05-27 2012-10-09 International Business Machines Corporation Error detection using parity compensation in binary coded decimal and densely packed decimal conversions

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